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Scientists say they can make zero-emission cement

Researchers on Wednesday said they were a step closer to solving one of the trickiest problems in tackling climate change—how to keep making cement despite its enormous carbon footprint.

Researchers develop carbon-negative concrete

A viable formula for a carbon-negative, environmentally friendly concrete that is nearly as strong as regular concrete has been developed at Washington State University.

Germany to draw up legislation to enable carbon storage

Germany is working on legislation to enable the use of the much-discussed technology of underground carbon storage, a top government official said Thursday, adding that it is preferable to releasing carbon dioxide into the ...

Metallurgist explains the surprising properties of aluminum

Despite being the most abundant metal on Earth, constituting over 8% of the Earth's core mass, aluminum was only discovered in the 1820s, by Danish physicist Hans Christian Ørsted. This is partly explained because pure aluminum ...

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Cement

In the most general sense of the word, a cement is a binder, a substance which sets and hardens independently, and can bind other materials together. The word "cement" traces to the Romans, who used the term "opus caementicium" to describe masonry which resembled concrete and was made from crushed rock with burnt lime as binder. The volcanic ash and pulverized brick additives which were added to the burnt lime to obtain a hydraulic binder were later referred to as cementum, cimentum, cäment and cement. Cements used in construction are characterized as hydraulic or non-hydraulic.

The most important use of cement is the production of mortar and concrete - the bonding of natural or artificial aggregates to form a strong building material which is durable in the face of normal environmental effects.

Cement should not be confused with concrete because the term cement explicitly refers to the dry powder substance. Upon the addition of water and/or additives the cement mixture is referred to as concrete, especially if aggregates have been added.

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